We look at the division of 99600455 by 381 
The aim is to understand the frequency of 381 in 99600455.

On to step 1:
The number 381 fits into 9 0 times, leaving a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (9) from the dividend to 9 and continue with: 99 / 381

Step 2:
When dividing 99 by 381, we get 0 with a remainder of 99.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 99, we end up with 99.
Fetch the next digit (6) from the dividend, attach it to 99 and continue: 996 / 381

Going ahead to step 3:
When dividing 996 by 381, we get 2 with a remainder of 234.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 762 from 996 and we're left with 234.
Take the next digit (0) from the dividend and append it to 234, then repeat: 2340 / 381

Let's proceed to step 4:
2340 divided by 381 is 6 with a remainder of 54.
Use 6 as the next digit of our solution. 
Result so far: 26.0
Subtract 2286 from 2340 to get 54.
Include the next digit (0) from the dividend after 54, then repeat: 540 / 381

Moving on to step 5:
When dividing 540 by 381, we get 1 with a remainder of 159.
The next digit of our result is 1. 
Result so far: 261.0
Subtracting 381 from 540 leaves us with 159.
Grab the next digit (4) from the dividend, add it to 159, then carry on: 1594 / 381

Step 6:
1594 divided by 381 is 4 with a remainder of 70.
Write down 4 as next digit of the result. 
Result so far: 2614.0
Subtracting 1524 from 1594 leaves us with 70.
Grab the next digit (5) from the dividend, add it to 70, then carry on: 705 / 381

Advancing to step 7:
If we divide 705 by 381, we get 1 and a remainder of 324.
The number 1 becomes the next digit in our result. 
Result so far: 26141.0
Subtracting 381 from 705 leaves us with 324.
Grab the next digit (5) from the dividend, add it to 324, then carry on: 3245 / 381

Advancing to step 8:
381 can be fit into 3245 8 times, resulting in a remainder of 197.
Use 8 as the next digit of our solution. 
Result so far: 261418.0
Deduct 3048 from 3245 and we're left with 197.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1970, and continue the process.

Going ahead to step 9:
The number 381 fits into 1970 5 times, leaving a remainder of 65.
Put 5 as the next digit of the answer. 
Result so far: 261418.5
Deduct 1905 from 1970 and we're left with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Moving on to step 10:
381 goes into 650 1 times with a remainder of 269.
Use 1 as the next digit of our solution. 
Result so far: 261418.51
Subtracting 381 from 650 leaves us with 269.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2690, and continue the process.

On to step 11:
381 can be fit into 2690 7 times, resulting in a remainder of 23.
The next digit of our result is 7. 
Result so far: 261418.517
Subtracting 2667 from 2690 leaves us with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Let's proceed to step 12:
381 can be fit into 230 0 times, resulting in a remainder of 230.
The next digit of our result is 0. 
Result so far: 261418.517
The remainder is 230 after subtracting 0 from 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Step 13:
The number 381 fits into 2300 6 times, leaving a remainder of 14.
Use 6 as the next digit of our solution. 
Result so far: 261418.51706
The remainder is 14 after subtracting 2286 from 2300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 14:
When dividing 140 by 381, we get 0 with a remainder of 140.
Record the quotient 0 as the next digit in the result. 
Result so far: 261418.51706
Deduct 0 from 140 and we're left with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Moving on to step 15:
1400 divided by 381 is 3 with a remainder of 257.
Put 3 as the next digit of the answer. 
Result so far: 261418.5170603
The remainder is 257 after subtracting 1143 from 1400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2570, and continue the process.

Step 16:
When dividing 2570 by 381, we get 6 with a remainder of 284.
Use 6 as the next digit of our solution. 
Result so far: 261418.51706036
Deduct 2286 from 2570 and we're left with 284.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

In conclusion, the division gives 261418.51706036 with a balance of 2.84e-07.